Pony Wall Toilet . The difference between a knee wall and a pony. This content is imported from instagram. Image result for what is a pony wall in a bathroom shower Pony wall from www.pinterest.com Pony walls, like regular walls, have top and bottom plates, that is, the horizontal members that the vertical studs fasten to. So far, we’ve removed the toilet, sink, mirror, hardware, light fixture, shoe molding and baseboards, floor tile, shower stall, and insulation. Some commenters chimed in with photos of agnate slots in their own bathrooms, which best frequently assume to be in the aback of anesthetic cabinets.